Bar for concrete construction.



PATENTED AUG. 18, 1908. J. H. SGHLAFLY. I BAR FOR CONCRETE CONSTRUCTION.

APPLICATION FILED JUNE 15 To all whom it may concern:

urriran STATES PATENT oFF'IoE.

JULIUS II. SOHLAFLY, OF CANTON,- OHIO, ASSIGNOR TO THE BERGERMANUFACTURING COMPANY, OF CANTON, OHIO, A CORPORATION OF OHIO.

BAR FOR CONCRETE CONSTRUCTION.

Specification of Letterelatent.

Patented 18, 1908.

Application filed June 15, 1907. Serial No. 379,219.

Be it known that I, J ULIUS H. SCHLAFLY, a citizen of the United States,residing at Canton, county of Stark, and State of Ohio, have inventedcertain new and useful Improvements in Bars for Concrete Construction,the object of which is to so form a bar that the forces acting in thesame line and in opposite directions will produce equilibrium and at thesame time produce abar so constructed that a constant and lightformation in crosssection is preserved throughout its entireembeddedlength.

The following is a full, clear, and exact description of my improvedreinforcing bar, reference being had to the accompanying drawing, makinga 'part of this specification and to the numerals and figures ofreference marked thereon, inwhich Figure 1 ,is a view showing a cementbody or portion of a wall or other cement struc-- ture illustrating thebar in proper relationship with reference to the cement structure. Fig.2 is a detached,view of the bar. Fig. 3 is an end view of the bar. Fig.4 is a longitudinal central section through the bar and illustrating aportion of the bar embedded or seated in cement. Fig. 5 is a transversesection on line 55, Fig. 2.

' Similar numerals of reference indicate corresponding parts in all thefigures of the drawing.

- In the accompanying drawing, 1 represents the body of the bar, whichbar is preferably formed square or rectangular but is to contain withinitself a sufiicient amount of metal toproduce a bar ofconsiderablerigidity and one not liable to vibrate with the shortvibrations in comparatively thin cement structures, either vertically orhorizontally.

The body of the bar is provided with the ribs 2, which ribs are formedof a length to correspond with the length of the bar proper, and tocarry out the object and purpose above described the ribs2 arecorrugated, the corrugations being substantially of the form shown inthe drawings, and the bar proper is corrugated, which corrugations arepractically parallel with the corrugatimis of the ribs. By forming theribs 2 as above described they will be seated in the cement so as'toproducean e ual strain upon each and every linearpa rt of the bar or inother words the strain as between the cement and the bar caused by anyvibrations will be equal and alike throughout the entire len th of the aI bar and when the bar extends t 1e entire length of the cement body,then the strain will be equal.

For the purpose of preventing vibrations the ribs 2 are corrugated sothat there can be practically no vibrations; but should slightvibrations occur; the d anger of separating the contact as between thecement and metal at any point is removed, owing to the fact that therecan be no excessive pulling or concentration of force at any particularpoint throughout the length of the bar.

Having fully described my invention what I claim as new and desire tosecure by Letters Patent, is.

1. As an improved article of manufacture, a bar formed rectangular incross-section, ribs extended from the angles ofsaid bar, said ribsformed of a length corresponding with .the length of the bar and the barand ribs twisted in opposite directions and the. ribs located parallelwith each other, sub-- stantially as and for the pur ose specified.

2. A bar for concrete wor r, cross-section, said bar provided withextended ribs located at its angles, said bar and ribs twisted in op)osite directions and said ribs located parallel with eachother,substantially as and for the purpose specified.

3. As an improved article of manufacture, a bar for concrete workprovided with ribs, said ribs located at the angles of the bar and thebar and ribs twisted in opposite direc tions, substantially as and forthe purpose specified.

In testimony that I claim the above, I have hereunto subscribed my namein the presence of two witnesses.

JULIUS H. SCIILAFLY.

Fit nesses:

En -IJANGENBAC1I, J. A. JEFFERS.

rectangular in

